The massive migration to cloud-based computing has raised the profile of cloud-based network infrastructure. Security is essential to cloud computing, and virtual next-generation firewalls (NGFW) are responsible for providing that security. Firewalls directly impact application performance -- and a firewall's performance, in turn, depends on the resource characteristics of the cloud instance where it runs. Thus, it is essential to establish key performance indicators (KPIs) for firewalls.

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